Steering device for aeroplanes and the like.



H. GAARA.

STEERING DEVICE FOR AEROPLANES AND THE LIKE.

APPLICATION FILED AUG. 17, 1910.

Patented July 11, 1911.

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HALVOR GAARA, oF-Bo, NORWAY.

STEERING DEVICE FOR AEROPLANES AND THE LIKE.

Specification of Letters Patent.

, Application filed au ust 17, 1910. Serial N... 577,581.

To all whom it may concern:

' Be it known that I, HALVOR GAARA, a subject of the King of Norway, residing at B6, Telemarken, Norway, have invented certain new and useful Improvements in Steering Devices for Aeroplanes and the Like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to-the accompanying drawings, and to letters or figures of reference marked thereon, which-form a part of this specification.

Myfinyention relates to steering devices for-aeroplanes and the like, and has for its ob'j ctllto-prov ide means whereby the manipulation of the rudders is facilitated.

Riidders of aeroplanes are difiicult to handle on account of the great pressure.

which the air eXerts on them, especially in certain conditi'onsof weather; to facilitate the moving of the rudders they are generally pivoted at or near the center line of the rudd r. -c1ade,- but this does not overcome the According-to my invention I combine the steering gear with adjustable propellers, so.

mounted on the aeroplane that when their blades are suitably adjusted the propeller will be set in motion by the air and by means of suitable gearing this motion is transferred to the rudders. or to the movable planes. Such an arrangement is by way of example shown in the accompanying drawing, whereinh Figure 1 is aside view and Fig. 2 an end view Referring in detail to the construction illustrated, 31 designates propeller blades pivotally mounted on arms 32, which areblades 31 are angularly displaced, and the.

wind pressure will rotate the shaft 33 (provided the direction of the wind is more or .less parallel to the shaft) A rope 40 which is Wound on the shaft, or on a wheel keyed to the same, and carried to one endof' rudde 41, is thereby moved, and the rue handle 34 and the number of revolutions 0r- Patented July 11, 1911.

parts of revolutions of the shaft 33. In-

order to obtain this it is necessary that the propeller blades be automatically returned to their inoperatit e position, when the propeller has made the number of revolutions that correspond to the angular displacement of the handle. This automatic return to inoperative position may be effected by the mechanism itself and may be brought about in various ways. One way is illustrated in Fig. 1, wherein the lower end of the lever 35 is fixed to the rope 40. hen the handle 34 is placed in the position II, the sleeve 36 will be drawn forward, and the shaft 33 will begin rotating. If the handle 34 is then kept in the position II, the rope 40 will draw the lower end of the lever from the point 42 to the point 43, returning the sleeve 36 to'its initial position, and consequently the propeller blades to their inoperative position.

*Qwing to the small amount of force required for operating the rudders by aid of the above steering mechanism, the same may be coupled to the back of the seat of the shaft. and rudder,'and means whereby the propeller blades may be adjusted from a position in which their planes are parallel with the shaft to an angular position relatively to said shaft.

2. In steering apparatus for aeroplanes and similar machines, the combination of a for aeroplanes rudder, a shaft, arms on said shaft, adjustable propeller blades carried by said arms, an operative connection between said'shaft and rudder, and means whereby said propeller blades are automatically returned to their original position.

3. In steering apparatus for aeroplanes and similar machines, the combination of a rudder, a shaft, arms on the said shaft, ad-

justable propeller blades on said arms, a sleeve sliding on the said shaft, connections between said sleeve and the propeller blades,

' rudder, a shaft, arms on the said shaft, ad-

justable propeller blades on said arms, a sleeve sliding on the said shaft or rotatable member, connections between said sleeve and sauna the propeller blades, a lever for operating the said sleeve, and an endless rope connect ing said shaft with the rudder and fastened to the pivotal point-of the said operating lever. a

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

HALVOR GAARA.

Witnesses:

VALUE-MAR CHRIsTnNs'nN, PAUL DAHMOKE. 

